WowAce

Helps you automate selling stuff.

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Automate Your GDKP Auctions, Bids, & Payouts

Draws some lovely 3D portraits in the standard Blizzard artwork.

Generate a macro with random mounts

Collect data about you myth+ challenges

FuBar_AmmoFu

Displays the time until the next battle and more.

Raid level alternative player power warning (Atramedes, Cho'gall, Lord Rhyolith)

DreamChat

ImprovedRWF

ClassColors

TradeStop

Provides access to all teleporting spells and items on right click of minimap button.

Fires events whenever a raid member "fails".

ChatHighlighter

A volume control for Data Broker.

Library to help with querying unit talents.

Shared handling of media data (fonts, sounds, textures, ...) between addons.

QR Code builder library